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marin [14]
3 years ago
12

What is the slope of the line passing through the points (3,-20) and (5, 8)?

Mathematics
2 answers:
AlekseyPX3 years ago
8 0

Answer:

-14

Step-by-step explanation

Gwar [14]3 years ago
4 0

Answer:

the answer is -28/20 hope it helps

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4x2 +9y2 = 72
Kamila [148]

Answer:

<h2>        \bold{\left(\dfrac{3}{13}\ ,\ \dfrac{4\sqrt{13}}{13}\right)\qquad\vee\qquad \left(\dfrac{3}{13}\ ,\ -\dfrac{4\sqrt{13}}{13}\right)}</h2>

Step-by-step explanation:

x - y² = -1     ⇒   - y² = - x - 1    ⇒    y² = x + 1   {x≥-1}

4x² + 9y² = 72

4x² + 9(x + 1)² = 72

4x² + 9(x² + 2x + 1) = 72

4x² + 9x² + 18x + 9 - 72 = 0

13x² + 18x - 63 = 0     ⇒   a = 13,  b = 18,  c = -63

x=\dfrac{-18\pm\sqrt{18^2-4\cdot13\cdot(-63)}}{2\cdot13}=\dfrac{-18\pm\sqrt{324+252}}{26}=\dfrac{-18\pm\sqrt{576}}{26}\\\\x=\dfrac{-18+24}{26}=\dfrac3{13}\qquad\vee\qquad x=\dfrac{-18-24}{26}=-\dfrac{21}{13}\\\\ y^2= x + 1\quad\iff\quad x\ge-1\\\\y^2=\dfrac3{13}+1\\\\ y^2=\dfrac{16}{13}\\\\y=\dfrac{4}{\sqrt{13}}=\dfrac{4\sqrt{13}}{13}\qquad\vee\qquad y=-\dfrac{4\sqrt{13}}{13}

4 0
3 years ago
What is the sum of -7/10 + 1/4
Allushta [10]
 Exact form -9/20 or in decimal form is -0.45

4 0
3 years ago
Which number is missing from the table of equal ratios?
Elodia [21]

Answer:

your answer is option (c) 105

3 0
3 years ago
Read 2 more answers
How many minutes are equal to 2 hours 20 minutes
ivann1987 [24]

Answer:

140

Step-by-step explanation:

tell me if I'm wrong

60+60+20=140

4 0
3 years ago
Convert 9340 m to km
Marina CMI [18]

Answer:

9.34 km

Step-by-step explanation:

  1. m to km = m ÷ 1000
  2. 9340 ÷ 1000 = 9.34

I hope this helps!

7 0
3 years ago
Read 2 more answers
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